J/AJ/161/171ivo://CDS.VizieR/J/AJ/161/171doi:10.26093/cds/vizier.51610171CDSTofflemire B.M.Rizzuto A.C.Newton E.R.Kraus A.L.Mann A.W.,Vanderburg A.Nelson T.Hawkins K.Wood M.L.Zhou G.Quinn S.N.,Howell S.B.Collins K.A.Schwarz R.P.Stassun K.G.Bouma L.G.,Essack Z.Osborn H.Boyd P.T.Furesz G.Glidden A.Twicken J.D.,Wohler B.McLean B.Ricker G.R.Vanderspek R.Latham D.W.Seager S.,Winn J.N.Jenkins J.M.2024-10-11T20:10:03Z2021-09-24T06:54:41ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frstellar-associationsinfrared-photometryvisible-astronomyradial-velocityThe detection and characterization of young planetary systems offer a direct path to study the processes that shape planet evolution. We report on the discovery of a sub-Neptune-sized planet orbiting the young star HD110082 (TOI-1098). Transit events we initially detected during TESS Cycle 1 are validated with time-series photometry from Spitzer. High-contrast imaging and high-resolution, optical spectra are also obtained to characterize the stellar host and confirm the planetary nature of the transits. The host star is a late-F dwarf (M*=1.2M{sun}) with a low-mass, M dwarf binary companion (M*=0.26M{sun}) separated by nearly one arcminute (~6200au). Based on its rapid rotation and Lithium absorption, HD110082 is young, but is not a member of any known group of young stars (despite proximity to the Octans association). To measure the age of the system, we search for coeval, phase-space neighbors and compile a sample of candidate siblings to compare with the empirical sequences of young clusters and to apply quantitative age-dating techniques. In doing so, we find that HD110082 resides in a new young stellar association we designate MELANGE-1, with an age of 250_-70_^+50^Myr. Jointly modeling the TESS and Spitzer light curves, we measure a planetary orbital period of 10.1827days and radius of Rp=3.2{+/-}0.1R{Earth}. HD110082b's radius falls in the largest 12% of field-age systems with similar host-star mass and orbital period. This finding supports previous studies indicating that young planets have larger radii than their field-age counterparts.2021AJ....161..171Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/171CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)I/305 : The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006)I/337 : Gaia DR1 (Gaia Collaboration, 2016)II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7)(Bianchi+ 2017)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)I/345 : Gaia DR2 (Gaia Collaboration, 2018)II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/331/81 : Hyades membership (Perryman+ 1998)J/A+A/367/111 : A Hipparcos study of the Hyades cluster (de Bruijne+, 2001)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/AJ/134/2340 : Membership Praesepe & Coma Berenices clusters (Kraus+, 2007)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/A+A/508/833 : SACY III. Li abundances (da Silva+, 2009)J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)J/AJ/139/1338 : UV-selected stars in Tau and Upper Sco (Findeisen+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/ApJ/727/125 : Two secondary eclipses of WASP-12b with Spitzer (Campo+,2011)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/MNRAS/413/2218 : Stellar rotation in Hyades and Praesepe (Delorme+, 2011)J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)J/ApJ/733/115 : Rotation periods and membership in M34 (Meibom+, 2011)J/ApJ/756/46 : Lithium abundances in HIP stars (Ramirez+, 2012)J/ApJ/754/136 : Light curves of HD 149026b in 3.6-16um (Stevenson+, 2012)J/ApJ/762/88 : Young stellar kinematic group candidate members (Malo+,2013)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/A+A/560/A4 : Rotation periods of active Kepler stars (Reinhold+, 2013)J/A+A/568/A26 : SACY. V. Multiple systems (Elliott+, 2014)J/MNRAS/443/2561 : CONCH-SHELL catalog of nearby M dwarfs (Gaidos+, 2014)J/AJ/147/146 : Spectroscopy of Tuc-Hor candidate members (Kraus+, 2014)J/A+A/571/A47 : Extensive linelist CH in stellar atmospheres (Masseron+, 2014)J/ApJS/211/5 : Improved line data for the Swan system ^12^C^13^C (Ram+, 2014)J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)J/A+A/583/A73 : Color-period diagram for M48 (NGC2548) (Barnes+, 2015)J/ApJ/807/45 : Potent. habitable planets orbiting M dwarfs (Dressing+, 2015)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/MNRAS/447/1267 : Low-mass members of the Octans association (Murphy+, 2015)J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) source catalog (Boller+, 2016)J/A+A/590/A13 : New candidate members in young associations (Elliott+, 2016)J/AJ/152/113 : Pleiades memb. with K2 light curves I. Periods (Rebull+, 2016)J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)J/AJ/153/128 : WOCS. LXXV. Hyades&Praesepe stellar Li data (Cummings+, 2017)J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)J/AJ/154/224 : Transiting planets in young clusters from K2 (Rizzuto+, 2017)J/AJ/154/69 : ACRONYM II. The {beta} Pictoris Moving Group (Shkolnik+, 2017)J/MNRAS/474/2094 : Inferring probabilistic stellar rot. periods (Angus+, 2018)J/ApJ/855/115 : Lithium abundances of KOIs from CKS spectra (Berger+, 2018)J/A+A/613/A63 : Lithium content for 148 Pleiades stars (Bouvier+, 2018)J/AJ/156/264 : California-Kepler Survey. VII. Planet rad gap (Fulton+, 2018)J/ApJ/856/23 : BANYAN. XI. The BANYAN {Sigma} algorithm (Gagne+, 2018)J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)J/AJ/156/259 : Robo-AO detected close binaries in Gaia DR2 (Ziegler+, 2018)J/ApJS/245/13 : CDIPS. I. LCs from TESS sectors 6 and 7 (Bouma+, 2019)J/ApJ/877/60 : YMGs. I. Young binaries & lithium-rich stars (Bowler+, 2019)J/ApJ/879/100 : K2 Prot for Hyades & Praesepe members (Douglas+, 2019)J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)J/AJ/157/211 : Unresolved binaries TESS with speckle imaging (Matson+, 2019)J/A+A/622/L13 : Stellar stream in Gaia DR2 discovery (Meingast+, 2019)J/MNRAS/490/3806 : Exoplanets & variable stars 47 Tuc field (Nardiello+, 2019)J/AJ/157/71 : Keck/NIRC2 astrometry for GSC 6214-210 b (Pearce+, 2019)J/ApJ/877/12 : Coma Ber & a Neighbor Stellar Group tidal tails (Tang+, 2019)J/AJ/160/239 : Cluster difference imaging photo. survey. II. (Bouma+, 2020)J/AJ/160/279 : Untangling Galaxy. II. Structure within 3kpc (Kounkel+, 2020)J/MNRAS/495/4924 : Exoplanets in Southern open clusters (Nardiello+, 2020)J/ApJS/246/4 : Catalog of ultrawide binary stars from Gaia DR2 (Tian+, 2020)J/AJ/161/65 : THYME. IV. 3 Exoplanets around TOI-451 B (Newton+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/171https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/171http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/171https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/171https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/171http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/171GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/171/table7 (The HD110082 neighborhood--MELANGE-1 candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/171/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/171/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/171/table7?GETtext/xml+votable180.050000true192.5893-88.12110.0055555555555555565/9229 6/32768 32774 32789 32798 32800 32804 32815 32820 32822 32825 32829 32840 32843-32844 32847 32868 32896 32900 32907 32912 36878 36887 36890 36892-36893 36904 36913 36920 36922-36923 36925 36927 36943-36944 36946 36969 36976 36982 37002 37017 37024 37028 37036 37057 37126 40965 40968-40970 40973 40981-40982 40985 40987-40988 40991 40993-40994 40996-40997 41000-41001 41010 41023-41025 41034 41036 41039-41040 41050 41060 41065 41074 41091 41107 41116 41124 41137 41146 41154-41155 41163 41224 41474 45061 45065 45067-45068 45072 45081 45087-45088 45090 45095 45101 45103 45105 45109 45113 45124 45131 45145 45156 45186 45194 452061.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/171?format=asciiOpticalInfrareddefaultJ/AJ/161/171/table7The HD110082 neighborhood--MELANGE-1 candidatesGaiaGaia DR2 identifiermeta.id;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[0.01/360] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-90/-74] Declination (J2000)degpos.eq.dec;meta.mainGmag[7.91/20.98] Gaia magnitudemagphot.mag;em.optfloatBp-Rp[0/4.2]? Bp-Rp colourmagphot.color;em.opt.B;em.opt.Rfloatnullablef_Bp-RpFlag on Bp-RP (1)meta.codecharRUWE[0.92/38.9] Renormalized unit weight errorstat.errorfloatVoff[0/4.98] Velocity offsetkm/sphys.veloc;arith.difffloatDist[0/25] Distancepcpos.distancefloatVcand[0.6/6.4] Candidate velocitykm/sphys.veloc;arith.difffloatRVel[-17.7/56.3]? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel[0.06/8.96]? Error on RVelkm/sstat.error;spect.dopplerVelocfloatnullabler_RVel[1/4]? Reference used for RVel (2)meta.ref;pos.frameintnullablel_EWLiLimit flag on LiEWmeta.code.errorcharEWLi[0.02/0.32]? Equivalent width of the lithium {AA}0.1nmspect.line.eqWidthfloatnullabler_EWLi[1/3]? Reference used for EWLi (2)meta.ref;pos.frameintnullableProt[0.1/10]? Rotation perioddtime.periodfloatnullablef_ProtFlag on Prot (1)meta.codecharfNUV/fJ[0.08/11.5]? Ratio of NUV to J-band flux density (10^-3^)phot.flux.density;em.IR.JfloatnullableW1-W3[-0.06/0.55]? W1-W3 colourmagphot.color;em.IR;em.IRfloatnullablee_W1-W3[0.02/0.2]? error on W1-W3magstat.errorfloatnullableNoteAdditional notemeta.notechar